Pattern for casting gear-wheels.



IPATENTED FEB. 14, 1905..

N5. 782,674. T. w. LOWE.

PATTERN PORCA'STING GEAR WHEELS.

APPLICATION FILED MAY 19, 1904.

WIT/(E8858:

ATTORNEYS UNITED STATE Patented February 14, 1905.

PATENT OFFICE.

PATTERN FOR CASTING GEAR-WHEELS.

SPECIFICATION forming part of Letters Patent No. 782,674, dated February14, 1905.

Application filed May 19, 1904. Serial No. 208,694.

To all, whom it may concern.-

Beit known that I, THEODORE WIoK LOWE, a citizen of the United States,and a resident of Stockton, in the county of Joaquin and State ofCalifornia, have invented a new and Improved Pattern for CastingGear-Wheels, of which the following is a full, clear, and exactdescription.

The object of the invention is to provide a new and improved pattern forcasting gearwheels and gear-racks arranged to permit the formation ofgear-wheel patterns of any desired diameter, shape of teeth, pitch, &c.,to insure casting of properly meshing gearwheels in a very simple andeconomical manner and without the use of the expensive gearwheelpatterns now employed.

The invention consists of novel features and parts and combinations ofthe same, as will be more fully described-hereinafter and then pointedout in the claims.

A practical embodiment of the invention is represented in theaccompanying drawings, forming a part of this specification, in whichsimilar characters of reference indicate corresponding parts in all theviews. v V

Figure 1 is a side elevation showing a flexible strip provided withgear-teeth applied to the wheel-blank. Fig. 2 is an enlarged plan viewof the flexible strip and the teeth thereon, and Fig. 3 is a sectionalside elevation of the same on the line 3 3 of Fig. 2.

On the face of the strip A, of wood, metal papier-mach, or othersuitable but preferably flexible material, are glued or otherwisesecured teeth or cogs B, spaced equidistant apart, according to thepitch of the gear-wheel to be made, and the said strip A, with the teethor cogs B thereon, is ,now placed upon and fastened in position on theface of a blank O, shaped to represent the Web or body of the gear wheelor rack to be cast.

As illustrated in Fig. 1, the flexible strip A, with the teeth Bthereon, is placed upon the peripheral face of a wheel and secured inposition on the rim of the wheel by glue or other means to form acomplete pattern,which can now be used in a mold for casting gearwheelstherefrom in the usual manner.

The teeth or cogs B are preferably formed by shaping a stick of wood,for instance, to represent in cross-section a desired tooth, and thisstick is now out transversely to form gear-teeth having a length of facecorresponding to the width of the desired gearwheel, the gear-teethformed being glued or otherwise secured with their bases to the flexiblestrip A, which is preferably of a width corresponding 'to the length offace of the tooth.

vIt is understood that as the strip A is made of a flexible material andsince the bend under eachtooth is so slight that it is practically astraight line the strip can be readily bent so as to lie smoothly on theperipheral surface of the wheel O, the ends of the strips abutting, asplainly indicated in Fig. 1, and the number of teeth corresponding tothe pitch diameter ,of the gear-wheel.

It is understoood that by the arrangement described patterns for.spur-wheels, internal gear-wheels, bevel gear-wheel, and the like can bereadily formed in the manner above set forth and at a comparativelysmall expense.

Having thus described my invention, 1 claim as new and desire to secureby Letters Patent- 1. A pattern comprising a wheel-blank, a flexiblestrip applied to the peripheral face of the said wheel-blank, and spacedgearteeth distinct from the strip and each secured to the outer face ofthe said strip by separate fastening means.

2. A pattern provided with a strip, and spaced gear-teeth distinct fromand individually secured to the face of the strip.

3. A pattern provided with a flexible surface-strip, and spacedgear-teeth distinct from and individually secured to the face of thestrip.

4. A pattern, comprising a body-blank, and a strip secured to the blankand having gearteeth thereon, said teeth being formed of separate piecesof wood secured to the strip.

5. A pattern, comprising a wheel-blank, and

a flexible strip secured to the blank and hav- In testimony WhereofIhavesigned my name ing gear teeth thereon, said teeth being to thisspecification in the presence of two subformed of separate pieces ofWood secured to scribing Witnesses.

the strip. THEODORE WICK LOWE. 5 6. A pattern provided with a flexiblestrip, Witnesses:

and gear-teeth formed of separate pieces of JOHN H. DoLAN,

Wood secured to one face of the strip. GEORGE J ENSEN.

